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[anomaly]

what are the odds of turning magma into obsidian with buckets and the pond designation?

I know it seems pretty unlikely, but has anyone attempted/succeeded in this task before?

[anomaly]

initial assessment is not good

i think if the flow comes from an infinite source (vent) you probably need to dump a whole bunch of water onto the lava all at once to have any chances of making obsidian and sealing magma off

[John Johnston]

Yes, water boils off instantly when dumped directly onto the magma, but you could build a pond somewhere above the magma, fill it at your leisure and then open a hatch or floodgate to dump the water onto the magma in one go.

[(name here)]

You could Pond it ahead of the flow, though. that should stop it.

[chris_acheson]

Someone mentioned in another thread that dumping a bucket of water onto magma from 2 or more Z levels up will work.

[John Johnston]

Ooh, I'll test that.  Watch this space...

[MetBoy]

Yes, water boils off instantly when dumped directly onto the magma, but you could build a pond somewhere above the magma, fill it at your leisure and then open a hatch or floodgate to dump the water onto the magma in one go.

Or channel out one side of the pond, that's worked for me.

[andrea]

i tryed buckets... they don't work (magma was 1 zlevel below. never tryed more). filling a pond near and opening a floodgate/channeling (depend on how you built the pond) should work, but be fast

[iskurthi]

Someone mentioned in another thread that dumping a bucket of water onto magma from 2 or more Z levels up will work.

Yep - 2 z-levels difference between the hole you're pouring into and the magma will create obsidian.

[John Johnston]

Someone mentioned in another thread that dumping a bucket of water onto magma from 2 or more Z levels up will work.

Yep - 2 z-levels difference between the hole you're pouring into and the magma will create obsidian.

I've just tried that and it didn't work - although admittedly I was pouring directly into the mouth of a magma pipe, so perhaps it only works on isolated magma?

[Frelock]

Possibly, I know 2 z-levels always worked for me.  The dwarf dumps the water down 1 z-level, so if there's magma there, it doesn't count.  But if there's an empty floor, then the water drops down onto the magma, forming obsidian.  It's a difference between "oh, there's already magma there, so I can't add water" to "oh, there's water above magma, and no floor between it, so make obsidian.